Question

Assertion: Silicon forms covalent crystals.

Reason: Its lattice consists of silicon atoms bonded together by covalent bonds in a three dimensional network.

Options

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

Explanation:

Silicon forms a covalent crystal because each silicon atom is sp³ hybridised and covalently bonded to four other silicon atoms in a three-dimensional network, just like in diamond. Hence, the Reason correctly explains the Assertion.